skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on February 1, 2019

Title: Hydrogen embrittlement in compositionally complex FeNiCoCrMn FCC solid solution alloy

The influence of internal hydrogen on the tensile properties of an equi-molar FeNiCoCrMn alloy results in a significant reduction of ductility, which is accompanied by a change in the fracture mode from ductile microvoid coalescence to intergranular failure. The introduction of 146.9 mass ppm of hydrogen reduced the plastic strain to failure from 0.67 in the uncharged case to 0.34 and 0.51 in hydrogen-charged specimens. This reduction in ductility and the transition in failure mode are clear indications that this alloy exhibits the classic signs of being susceptible to hydrogen embrittlement. The results are discussed in terms of the hydrogen-enhanced plasticity mechanism and its influence on hydrogen-induced intergranular failure. Furthermore, a new additional constraint that further promotes intergranular failure is introduced for the first time.
Authors:
 [1] ;  [2] ;  [1] ; ORCiD logo [3] ;  [4] ;  [5]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics
  2. Univ. of Illinois, Urbana, IL (United States). Dept. of Materials Science and Engineering; Kyushu Univ. (Japan). International Inst. for Carbon-Neutral Energy Research
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  4. Kyushu Univ. (Japan). International Inst. for Carbon-Neutral Energy Research; JFE Holdings, Inc., Tokyo (Japan). Steel Research Lab.,Materials Surface and Interface Science Research Dept.
  5. Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics and Dept. of Materials Science and Engineering; Kyushu Univ. (Japan). International Inst. for Carbon-Neutral Energy Research
Publication Date:
Grant/Contract Number:
AC05-00OR22725; CMMI-1406462; DMR-1121288
Type:
Accepted Manuscript
Journal Name:
Current Opinion in Solid State and Materials Science
Additional Journal Information:
Journal Volume: 22; Journal Issue: 1; Journal ID: ISSN 1359-0286
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); JFE Holdings, Inc., Tokyo (Japan); Ministry of Education, Culture, Sports, Science and Technology (MEXT); Kyushu Univ. (Japan); Univ. of Wisconsin, Madison, WI (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; High entropy alloy; Hydrogen embrittlement; Mechanical properties; Grain boundaries
OSTI Identifier:
1427650